1,720,954 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Trajectory optimization for aerial robots with physical interactions
No full textLAUREA MAGISTRALENegli ultimi anni la Robotica Aerea ha conosciuto una notevole crescita di popolarità e di applicazioni. Tuttavia, nonostante il loro largo utilizzo, i robot aerei sono significativamente limitati a causa della loro scarsa autonomia. Possibili soluzioni emergenti al problema di limitare il consumo di energia prevedono l’interazione con superfici. Queste interazioni possono realizzarsi grazie alla possibilità di aggrapparsi a delle superfici fisse quali i rami degli alberi o di permettere la locomozione terrestre usando strutture di rotolamento esterne in soluzioni ibride. In questo lavoro si considerano modelli di robot aerei in presenza di possibili interazioni fisiche con superfici. In questo contesto viene proposta una strategia di controllo che si basa su Model Predictive Control (MPC) in grado di ottimizzare la traiettoria del robot aereo. Innanzitutto, introdurremo il modello di un quadrirotore, un robot aereo con 4 rotori, capace di scivolare su una superficie priva di attrito (usando per esempio una struttura di rotolamento esterna), e il modello della forza di contatto ottenuto usando un problema di complementarità lineare. Successivamente formuleremo e risolveremo il problema di MPC utilizzando un recente metodo numerico detto iterative Linear Quadratic Regulator. Questo approccio permette di ottenere risultati promettenti evidenziando come il quadrirotore sfrutti la presenza della superficie di contatto per raggiungere una destinazione in modo efficiente dal punto di vista energetico. Infine, per mettere alla prova la flessibilità dell’approccio modellistico e di controllo usato, abbiamo considerato un secondo scenario applicativo: il caso del sollevamento di oggetti tramite una fune usando un quadrirotore, dove l’algoritmo si è dimostrato in grado di gestire correttamente la forza di tensione (modellata con un problema di complementarità lineare) usando un unico modello del sistema, invece di ricorrere ad un sistema ibrido basato sulle differenti fasi della manovraIn recent years, Aerial Robotics has experienced an extreme growth in popularity and applications but, despite their large use, flying robots are still significantly limited by their poor endurance. Possible emerging solutions for limiting the energy consumption include interactions with surfaces, e.g. perching to fixed surfaces like tree branches or using terrestrial locomotion through external rolling structures in hybrid robot solutions. In this work we consider aerial robots in presence of possible physical interactions with surfaces. In this framework, we present a Model Predictive Control (MPC) strategy that enables to perform online optimization tasks. First of all, we introduce the model of a 4-rotor Unmanned Aerial Vehicle, capable of sliding over a frictionless surface (e.g. through a rolling external cage), along with the contact force modeling obtained thanks to a Linear Complementarity Problem. Secondly, we formulate a dedicated MPC problem solved using a recently proposed numerical method, the iterative Linear Quadratic Regulator. This approach shows interesting results highlighting how the quadrotor takes advantage of the presence of the surface to reach a goal position in an energy efficient way. To prove the flexibility of this technique, we apply this modeling and control approach to a different scenario: the case of a cable-suspended load lifting quadrotor. In this case the devised control algorithm is able to manage correctly the tension force (modelled with Linear Complementarity Problem) using a unique model of the system instead of resorting to a hybrid system representing the different phases of the manoeuvre
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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